Portion of a toothbrush



FIG. 1 is a right front perspective view of a portion of a toothbrush according to a first embodiment of the new design;

FIG. 2 is a left front perspective view thereof;

FIG. 3 is a left rear perspective view thereof;

FIG. 4 is a right rear perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a top view thereof;

FIG. 10 is a bottom view thereof;

FIG. 11 is a right front perspective view of a portion of a toothbrush according to a second embodiment of the new design;

FIG. 12 is a left front perspective view thereof;

FIG. 13 is a left rear perspective view thereof;

FIG. 14 is a right rear perspective view thereof;

FIG. 15 is a front view thereof;

FIG. 16 is a rear view thereof;

FIG. 17 is a left side view thereof;

FIG. 18 is a right side view thereof;

FIG. 19 is a top view thereof; and,

FIG. 20 is a bottom view thereof.

The portions depicted in broken line illustrate parts of the toothbrush that form no part of the claimed design. 

CLAIM The ornamental design for a portion of a toothbrush, as shown and described. 